If we use as a basis the total number of active physicians practicing in each region(*) and compare this to the activities of the Recovery Auditors, then an uneven pattern emerges.
One would assume that the audit patterns would be roughly similar, but they are not.
(Source: Barraclough analysis.)
It appears that HDI audits the least number of claims per physician, but in exchange recovers the greatest amount of claw backs.
NOTE: (*) Source: The Henry J. Kaiser Family Foundation